EP2559529A1 - Procédé de réglage de la vitesse d'un dispositif de coupe - Google Patents
Procédé de réglage de la vitesse d'un dispositif de coupe Download PDFInfo
- Publication number
- EP2559529A1 EP2559529A1 EP20120179689 EP12179689A EP2559529A1 EP 2559529 A1 EP2559529 A1 EP 2559529A1 EP 20120179689 EP20120179689 EP 20120179689 EP 12179689 A EP12179689 A EP 12179689A EP 2559529 A1 EP2559529 A1 EP 2559529A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stack
- printed products
- cutting unit
- cutting
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
- B26D5/30—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier
- B26D5/32—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member controlled by scanning a record carrier with the record carrier formed by the work itself
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
- B26D7/0675—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form specially adapted for piles of sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/02—Pile receivers with stationary end support against which pile accumulates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/30—Arrangements for removing completed piles
- B65H31/3009—Arrangements for removing completed piles by dropping, e.g. removing the pile support from under the pile
- B65H31/3018—Arrangements for removing completed piles by dropping, e.g. removing the pile support from under the pile from opposite part-support elements, e.g. operated simultaneously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/30—Arrangements for removing completed piles
- B65H31/3027—Arrangements for removing completed piles by the nip between moving belts or rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/30—Arrangements for removing completed piles
- B65H31/3081—Arrangements for removing completed piles by acting on edge of the pile for moving it along a surface, e.g. by pushing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/32—Auxiliary devices for receiving articles during removal of a completed pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H33/00—Forming counted batches in delivery pile or stream of articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/42—Piling, depiling, handling piles
- B65H2301/421—Forming a pile
- B65H2301/4212—Forming a pile of articles substantially horizontal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/42—Piling, depiling, handling piles
- B65H2301/422—Handling piles, sets or stacks of articles
- B65H2301/4229—Handling piles, sets or stacks of articles cutting piles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/50—Occurence
- B65H2511/51—Presence
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/50—Timing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
- B65H2557/20—Calculating means; Controlling methods
- B65H2557/24—Calculating methods; Mathematic models
- B65H2557/242—Calculating methods; Mathematic models involving a particular data profile or curve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/19—Specific article or web
- B65H2701/1932—Signatures, folded printed matter, newspapers or parts thereof and books
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/04—Processes
- Y10T83/0476—Including stacking of plural workpieces
Definitions
- the invention relates to a method for controlling the speed of a cutting device, wherein the cutting device comprises a cutting unit for cutting printed products and a feeding device for supplying printed matter to the cutting unit, wherein prior to cutting from the printed products in a stacking device stacks of printed products are formed and wherein the printed products of a to be formed stack on a first conveying element of the feeder are transported sequentially.
- Raw bound printed matter such as books, paperbacks, magazines or similar products are trimmed to final size after binding to the three unbound edges.
- the machines required for the entire production process are usually linked together serially.
- first printed sheets fed to a gathering machine and collected by this loose book block.
- the loose book blocks are transferred to a binding machine, in which the book blocks bound in the spine area and the bound printed products transported by means of conveyor belts, on which the setting process of the adhesive used is carried to a cutting device.
- the cutting device further machines, such as stackers, filming machines and tying machines can be arranged.
- Such a cutting device with a three-knife cutter is for example in the DE3302946 C2 disclosed.
- Such devices have the disadvantage that the achievable number of cycles is significantly lower than the maximum achievable number of cycles of the other machines.
- this disadvantage can be compensated for by feeding the printed products into the cutting unit of the cutting device in stacks.
- the height of the stack to be cut, or the number of printed products per stack, is thereby generated by one, the cutting unit upstream, so-called investor and the stack is fed through this the cutting unit.
- the feeder comprises a magazine in which the printed products delivered by the binding machine are stacked and a push-off system which pushes down from the magazine stacks of defined height or a defined number of printed products and transfers them to the cutting unit.
- the number of cycles of the three-knife trimmer is set slightly higher than is necessary due to the average performance of the binding machine. This reduces the filling level in the magazine continuously.
- the level of the magazine is monitored. With a minimum permissible level, the deportation is interrupted and one or more empty cycles of the cutting unit are introduced until a sufficient fill level is reached again. Alternatively, instead of introducing idle cycles, the cutter may be stopped.
- Such devices have proven themselves in the processing of thick printed products. For thin printed products, however, an exact separation in the stack is uncertain, which can lead to malfunctions and machine downtime.
- a counted stack is formed in a further design form of cutting devices in the magazine, which is then pushed into the cutting unit.
- the supply of other printed products must be interrupted.
- an accumulation conveyor may be provided in front of the magazine of the cutting device.
- the number of cycles of the cutting unit can be selected slightly higher than the average number of cycles required, thus overfilling the accumulation conveyor is avoided. This can be generated from time to time empty cycles or the cutting unit can be stopped.
- a disadvantage is the power limitation that results from the accumulation conveyor. Namely, the printed products can not be accelerated fast enough after the jam itself by means of a suction belt. Another disadvantage is that sanding marks on the printed products with sensitive surfaces can occur due to the accumulation conveyor.
- the loading device has a counting magazine with two stacking trays arranged one above the other, which are automatically controlled by the feeding and removal of the printed products. With a slide arranged below the counting magazine, the complete stack of printed products can be fed isochronically to the cutting cell.
- the controller uses signals from magazine-mounted sensors to detect book blocks, with the first sensor positioned directly in front of the magazine, the second at the bottom of the stack and the third at the feed table. Dependent on the number of copies per stack, the counting magazine is operable in different modes.
- the DE10321370 also describes a cutting device with a counting magazine, this is preceded by a shed separation device. This should be processed safely thin products that are conveyed in a scale flow.
- the invention has for its object to control the speed of a cutting device such that in irregular supply of printed products, the buffer capacity of the stacking magazine is sufficient in any case, to avoid overfilling.
- the printed products should be treated gently on their surfaces.
- the inventive object is achieved by a method for controlling the speed of a cutting device, wherein the printed products each detected a stack to be formed and based on a time of detection of a last printed product of each stack to be formed an actual cycle number of the cutting unit is controlled such that the stack the cutting unit is fed within a time window.
- the stack formed is transported on a second conveying element of the feeder to the cutting unit.
- the time window is calculated as the difference between a longest available time and a shortest available time for feeding the stack formed to the second conveyor element.
- the stack formed is transported to the cutting unit with a slide of the second conveyor element, wherein a minimum and a maximum value for an offset time is calculated from the calculated time window and the transport of the stack to the cutting unit takes place after the offset time has elapsed.
- the actual number of cycles of the cutting mechanism is controlled on the basis of the arrival time of the last printed product of a stack to be formed.
- the control of the actual cycle number of the cutting unit can be done by reducing or increasing this actual cycle number compared to a previous cycle number.
- at least one empty cycle of the cutting unit is preferably inserted and the actual cycle number of the cutting unit is increased.
- the speed of the printed products on the first conveying element of the feeding device is adjusted depending on a length of the printed products and independent of the actual cycle number of the cutting unit.
- the cutting device printed products can be supplied from an upstream processing machine, wherein a nominal number of cycles of the cutting unit of the cutting device is specified by the processing machine.
- the Fig. 1 shows a cutting device 1, by means of a conveyor 2 printed products 3 in a conveying direction F from an upstream processing machine 33, such as a binding machine for the production of printed products, a Entstapelvorplatz or a feeder, are supplied.
- the printed products 3 need not be fed directly from the processing machine 33, but can be cached, for example, before being fed to the cutting device 1.
- the cutting device 1 the printed products 3 are cut to finished size at the three open side edges.
- the arranged between the processing machine 33 and the cutting device 1 conveyor 2 is formed in the simplest case by successive conveyor belts on which the printed products 3 are conveyed individually and in succession.
- the conveyor 2 may have additional devices, such as scaling and Abschschungsungsvortechniken, Ausschleus- and distribution points, addressing devices and curve elements.
- the conveyor 2 feeds the printed products 3 one after the other to a feeding device 4 of the cutting device 1, which has a first conveying element 26 which is presently designed as a belt conveyor and which can be driven by means of a controllable motor M 1 .
- the speed of the first conveying element 26 upstream conveyor 2 is selected depending on the length of the printed products 3 and the number of cycles of the processing machine 33 so that the spaces between successive printed products 3 on the conveyor 2 are as low as possible.
- the frequency of supplied printed products 3 is thereby limited upwards.
- the speed of the first conveying element 26 is always higher than the speed of the conveyor 2.
- the printed products 3 are fed to a stacking device 5, which is formed by a vertical stacking shaft 6 with upper stacking slides 7 and lower stacking slides 8 arranged on two levels.
- the paired stacking slides 7, 8 are in the direction of a double arrow D between a closed position in which the printed products 3 are retained and an open position in which the printed products 3 are released, displaceable.
- the stacking slides 7, 8 are additionally accelerated vertically downwards during opening.
- the stacking shaft 6 is bounded below by a second conveying element 9 in the form of an infeed table, are fed to the stack 10 formed by the stacking device 5 from a number of printed products 3 stack from above.
- the stack 10 are promoted by a likewise displaceable in the direction of the double arrow D back and forth inserter 11 on a cutting table, not shown, a cutting unit 12 of the cutting device 1. Subsequently, the stack 10 is clamped between the cutting table and a press plate, also not shown. In this position, the stack 10 is trimmed by means of a front knife 13 at the front edge and by means of side knives 14 at the two side edges, wherein the cutting sequence can also be reversed. After releasing the press plate, the finished trimmed stack 10 is removed by means of a first conveyor 15 and a subsequent second conveyor 16 in a discharge direction A. As a result, the cutting table is free for receiving the next batch 10 to be trimmed.
- the slide 11 are driven by a motor M 2 , front blade 13 and side blade 14 together by a motor M 3 , the first conveyor 15 by a motor M 4 and the second conveyor 16 by a motor M 5 .
- Another Motor M 6 forms a main drive of the cutting device 1.
- the main drive drives all not previously mentioned organs of the cutting device 1, such as alignment on the cutting table, transfer devices, etc. and forms the master drive for the motors M 1 .... 5
- the motors M 16 are designed as angle-controlled motors, which are connected to corresponding drive controllers A 1 ... 6 .
- the drive controllers A 1... 6 are connected to a control device 17 for exchanging control signals.
- the drive controllers A 1... 6 may be designed as part of the control device 17.
- Outputs of the control device 17 are connected to not shown actuating means for the upper stacking slide 7 and the lower stacking slide 8 and inputs of the control device 17 with light barriers L 1 ... 3 and a sensor 24.
- the light barrier L 1 is located at the beginning and the light barrier L 3 at the end of the first conveying element 26.
- the light barrier L 2 is arranged after the light barrier L 1 , wherein a distance 30 between these two light barriers L 1 , L 2 corresponds to at least the length of a printed product 3 in the conveying direction F.
- the method will be described in detail below, with reference to the Fig. 2 to Fig. 5 , described.
- the following examples all relate to the cutting of printed matter 3 in stacks of three copies. However, they are generally valid, with a stack 10 being formed by at least one printed product 3.
- the processing machine 33 produces with a defined number of cycles T, resulting in a nominal number of cycles T N of one third of the number of cycles T of the processing machine 33 and one cycle time t Z for the cutting device 1.
- In continuous operation of the feeding device 4 of the cutting device 1 to be trimmed printed products 3 are also fed continuously through the conveyor 2.
- the light beam, the light barrier L 2 is cyclically interrupted by the transported printed products 3. This results in a signal with dark phases 18 when the light beam is interrupted and with light phases 19 when no printed product 3 is in the range of the light beam.
- An associated timing diagram is in Fig. 2 shown above, wherein each formed from a dark phase 18 and a light phase 19 pulses 20 consecutively numbered printed products 3 of the respective stack to be formed 10.
- the indication in the parenthesis indicates the number of a batch 10 and the subscript number indicates a number of the printed product 3 in the stacking 10.
- the pulse 20 having the number (n + 1) 2 is thus the printed product 3 having the number two in the stacking 10 associated with the number (n + 1).
- the control device 17 calculates an associated actual cycle number T E or a machine cycle Z n of the cutting device 1 and drives the motor M 6 by means of the drive controller A 6 corresponding speed. This results in continuously generated pulses 20 through the light barrier L 2, a likewise continuous running of the cutting device 1 with the actual cycle number T E , which corresponds to the nominal cycle number T N.
- the actual cycle number T E is limited upwards by a maximum cycle number T MAX and downwards by a minimum cycle number T MIN .
- the speed of the first conveying element 26 of the feeding device 4 is calculated by the control device 17 on the basis of the control device 17 known length of the printed products 3 in the conveying direction F and the motor M 1 driven by the drive controller A 1 at the required speed, the speed of first conveyor element 26 is limited downwards. As a result, it is achieved on the one hand, wiping the printed products 3 in the feeder 4 sufficiently large gaps are formed and on the other hand, a minimum speed in the (lintel-like) supply of the printed products 3 in the stacking device 5 is not exceeded.
- a clock 22 is provided, which is formed of a toothed wheel 23 and connected to the control device 17 sensor 24.
- an already incorporated in the motor M 1 rotary encoder can be used for this purpose.
- the control device 17 By detecting the printed products 3 with the light barrier L 2 and a product tracking, the control device 17 at any time able to calculate the position of a printed product 3 on the first conveying element 26 relative to the light barrier L 2 and a time t B , which requires a printed product 3 to cover a distance 31 between the light barrier L 2 and the light barrier L 3 , or the time until the printed product 3 should arrive at the stacking shaft 6.
- control device 17 can calculate an at least required time t k , which is required after the detection of a last printed product 3 of the stack to be formed by the light barrier L 3 until a finished stack 10 has formed on the lower stacking slides 8 and a time t l , which is available at most, until the lower stacking slide 8 must be opened so that they are ready in time for the formation of a next batch 10.
- a time window 25 formed by the time t 1 and time t k the lower stacking slides 8 must be opened and thus the stack 10 fed to the second conveying element 9 from above.
- the slide 11 must be located in a rear end position 27 when the lower stacking slide 8 are opened and may only begin its forward movement when the stack 10 is on the second conveyor element 9.
- the movement sequence 29 of the slide 11 is in the Fig. 2 to Fig. 5 shown, wherein the slide 11 between its rear end position 27, in which a stack 10 can be supplied from above and a front end position 28, in which the stack has been completely promoted to the cutting table, is displaceable.
- the slide 11 In its rear end position 27, the slide 11 is stationary during a rest time t r , wherein the rest time t r corresponds to a constant portion of a machine cycle Z n .
- the earliest possible time t f is obtained when the stack 10 is supplied from the top at time t k and has reached the second delivery element 9 immediately after a fall time t o .
- the latest possible time t s arises when the stack 10 is supplied at the time t l from above, at the same time the slide 11 has reached its rear end position 27 and after Expiration of the rest time t r , during which the inserter 11 remains in the rear end position 27.
- the control device 17 compares the calculated time t B , with a measured and corrected in case of deviation, the actual cycle number T E of the cutting unit 12 in the sense that the beginning of the insertion movement can take place at the intended location within the area B.
- the stacking slides 7, 8 By means of measuring the time of arrival of the printed products 3 at the stacking shaft 6, it is additionally possible to control the stacking slides 7, 8 more precisely in terms of time.
- the process is described with reference to stack 10, consisting of the three printed products 3 with the numbers n 1 , n 2 , n 3 .
- Printed products 3 with the numbers n 1 and n 2 are detected by the light barrier L 2 and generate the pulses 20 (n 1 ) and 20 (n 2 ). If the front edge of the printed product 3 with the number n 3 reaches the light barrier L 2 , the times t 1 , t k , t 0 , t v t r and t B are determined. From this, the control device 17 then calculates the offset time t Offset .
- Some of the values for the times t 1 , t k , t o , t v , t r and t B may alternatively be stored as a constant in a memory of the control device 17 and read out from here.
- the value for t o can be classified as constant, for example, if the fall time t o a stack 10 in one and the same stacking device 5 constructively always has the same value.
- Fig. 3 shows the case in which the three printed products 3 arrive with the numbers n 1 ... 3 with increased cadence and thus arrives earlier, the third, or last printed product 3 with the number n 3 to be formed, the number n bearing stack 10 than at a previous machine cycle Z ( n-2 ).
- the actual cycle number T E is increased so far that the slide 11 is then ready to insert the next stack 10 with the number n after the time t offset isochronous.
- the machine cycle Z (n-1) for the stack 10 having the number (n-1 ) is shortened with respect to the machine cycle Z (n-2) .
- Fig. 4 shows the case in which the three printed products 3 arrive with the numbers n 1 ... 3 with reduced cadence and thus arrives later, the third, or last printed product 3 with the number n 3 to be formed, the number n carrying stack 10 later than the previous machine cycle Z (n-2) .
- the actual cycle number T E is reduced so much that the slide 11 is then ready in time to insert the next stack 10 with the number n isochromatically after the time t offset .
- the machine cycle Z (n-1) for the stack 10 having the number (n-1 ) is lengthened from the machine cycle Z (n-2) .
- the cutting unit 12 will be moved over several machine cycles with increased or decreased actual Number of cycles T E driven.
- the last printed product 3 preceding Print products 3 to detect a stack 10 to be detected by the light barrier L 2 and by evaluating this signal already the actual cycle number T E to control.
- a case is shown in which the third, or last printed product 3 with the number n 3 of the stack 10 is detected so far belated by the light barrier L 2 that the calculated actual cycle number T E would have to be lower than the minimum number of cycles T MIN , which is not possible.
- the actual cycle number T E is increased and the slide 11 retained during at least one machine cycle Z in its rear end position 27, whereby the cutter 12 performs at least one so-called empty cycle in a machine cycle Z empty .
- the slide 11 remains in its rear end position 27 and the motor M 3 for driving the front blade 13 and the side blade 14 is then stopped for the duration of a machine cycle.
- the method can be simplified as a synchronization method of the cutting unit 12 of a cutting device 1 by previously detecting the printed products 3 and controlling the actual number of cycles of the cutting unit 12 according to the supplied printed products 3, wherein in the case that the stack to be cut 10th is formed too late, the actual cycle number T E of the cutting unit 12 is increased and at least one empty cycle is generated.
- the control device 17 is able to determine whether and where a printed product 3 is located on the first conveyor element 26.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Forming Counted Batches (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Making Paper Articles (AREA)
- Pile Receivers (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Geschwindigkeitsregelung einer Schneidvorrichtung, wobei die Schneidvorrichtung ein Schneidwerk zum Schneiden von Druckerzeugnissen und eine Zuführvorrichtung zum Zuführen von Druckerzeugnissen zum Schneidwerk aufweist, wobei vor dem Schneiden aus den Druckerzeugnissen in einer Stapelvorrichtung Stapel von Druckerzeugnissen gebildet werden und wobei die Druckerzeugnisse eines zu bildenden Stapels auf einem ersten Förderelement der Zuführvorrichtung nacheinander transportiert werden.The invention relates to a method for controlling the speed of a cutting device, wherein the cutting device comprises a cutting unit for cutting printed products and a feeding device for supplying printed matter to the cutting unit, wherein prior to cutting from the printed products in a stacking device stacks of printed products are formed and wherein the printed products of a to be formed stack on a first conveying element of the feeder are transported sequentially.
Roh gebundene Druckerzeugnisse wie Bücher, Taschenbücher, Zeitschriften oder ähnliche Produkte werden nach dem Binden an den drei nicht gebundenen Kanten auf Fertigmass beschnitten. Bei der industriellen Herstellung derartiger Produkte sind die für den gesamten Fertigungsprozess erforderlichen Maschinen meistens seriell miteinander verkettet. Dabei werden zunächst bedruckte Bogen einer Zusammentragmaschine zugeführt und durch diese zu losen Buchblocks zusammengetragen. Anschliessend werden die losen Buchblocks in eine Bindemaschine überführt, in der die Buchblocks im Buchrückenbereich gebunden und die gebundenen Druckerzeugnisse mittels Transportbändern, auf denen der Abbindeprozess des verwendeten Klebstoffs erfolgt, zu einer Schneidvorrichtung transportiert. Nach der Schneidvorrichtung können weitere Maschinen, wie beispielsweise Stapler, Foliermaschinen und Verschnürmaschinen angeordnet sein.Raw bound printed matter such as books, paperbacks, magazines or similar products are trimmed to final size after binding to the three unbound edges. In the industrial production of such products, the machines required for the entire production process are usually linked together serially. Here, first printed sheets fed to a gathering machine and collected by this loose book block. Subsequently, the loose book blocks are transferred to a binding machine, in which the book blocks bound in the spine area and the bound printed products transported by means of conveyor belts, on which the setting process of the adhesive used is carried to a cutting device. After the cutting device further machines, such as stackers, filming machines and tying machines can be arranged.
Auch wenn die Geschwindigkeiten der Maschinen und Fördereinrichtungen aufeinander abgestimmt sind, kann sich insbesondere auf den Transportbändern zwischen Bindemaschine und Schneidvorrichtung eine unregelmässige Förderung ergeben, weil z.B. fehlerhafte Druckerzeugnisse ausgeschleust, durch das Bedienpersonal Belegexemplare entnommen und wieder zugeführt oder die Druckerzeugnisse bei Umlenkungen gestaut werden. Dies führt dazu, dass die Druckerzeugnisse insbesondere der Schneidvorrichtung unregelmässig zugeführt werden.Even if the speeds of the machines and conveyors are coordinated, an irregular promotion may result, in particular on the conveyor belts between binding machine and cutting device, for example, because faulty printed matter discharged, removed by the operator Belegexemplare and fed again or the printed matter are stowed at deflections. As a result, the printed products, in particular the cutting device, are supplied irregularly.
Eine derartige Schneidvorrichtung mit einem Dreischneider ist beispielsweise in der
Um ein Leerfahren des Magazins zu verhindern, wird der Füllstand des Magazins überwacht. Bei einem minimal zulässigen Füllstand wird das Abschieben unterbrochen und ein oder mehrere Leertakte des Schneidwerks werden eingeführt, bis wieder ein genügender Füllstand erreicht ist. Alternativ kann anstelle des Einführens von Leertakten die Schneidvorrichtung angehalten werden. Derartige Vorrichtungen haben sich bei der Verarbeitung dicker Druckerzeugnisse bewährt. Bei dünnen Druckerzeugnissen ist jedoch eine exakte Abtrennung im Stapel unsicher, was zu Störungen und Maschinenstillständen führen kann.To prevent the magazine from becoming empty, the level of the magazine is monitored. With a minimum permissible level, the deportation is interrupted and one or more empty cycles of the cutting unit are introduced until a sufficient fill level is reached again. Alternatively, instead of introducing idle cycles, the cutter may be stopped. Such devices have proven themselves in the processing of thick printed products. For thin printed products, however, an exact separation in the stack is uncertain, which can lead to malfunctions and machine downtime.
Zur Vermeidung dieses Problems wird bei einer weiteren Gestaltungsform von Schneidvorrichtungen im Magazin ein abgezählter Stapel gebildet, der anschliessend in das Schneidwerk geschoben wird. Während des Einschiebens muss die Zufuhr von weiteren Druckerzeugnissen unterbrochen werden. Dazu kann vor dem Magazin der Schneidvorrichtung ein Stauförderer vorgesehen sein. Auch bei dieser Art von Vorrichtungen kann die Taktzahl des Schneidwerks leicht höher gewählt werden, als die durchschnittlich erforderliche Taktzahl, damit ein Überfüllen des Stauförderers vermieden wird. Dabei können von Zeit zu Zeit Leertakte erzeugt werden oder das Schneidwerk kann angehalten werden. Durch den Zählvorgang lassen sich genaue Stapel auch mit dünnen Druckerzeugnissen erreichen. Nachteilig ist jedoch die Leistungsbegrenzung, die sich durch den Stauförderer ergibt. Die Druckerzeugnisse können nämlich nach dem Stau selbst mittels eines Saugbandes nicht schnell genug beschleunigt werden. Ein weiterer Nachteil besteht darin, dass an Druckerzeugnissen mit empfindlichen Oberflächen Schleifspuren durch den Stauförderer entstehen können.To avoid this problem, a counted stack is formed in a further design form of cutting devices in the magazine, which is then pushed into the cutting unit. During insertion, the supply of other printed products must be interrupted. For this purpose, an accumulation conveyor may be provided in front of the magazine of the cutting device. Even with this type of devices, the number of cycles of the cutting unit can be selected slightly higher than the average number of cycles required, thus overfilling the accumulation conveyor is avoided. This can be generated from time to time empty cycles or the cutting unit can be stopped. Through the counting process, accurate stacks can be achieved even with thin print products. However, a disadvantage is the power limitation that results from the accumulation conveyor. Namely, the printed products can not be accelerated fast enough after the jam itself by means of a suction belt. Another disadvantage is that sanding marks on the printed products with sensitive surfaces can occur due to the accumulation conveyor.
In der
Mit einer in der
Die
Der Erfindung liegt die Aufgabe zugrunde, die Geschwindigkeit einer Schneidvorrichtung derart zu regeln, dass bei unregelmässiger Zufuhr der Druckerzeugnisse die Pufferkapazität des Stapelmagazins in jedem Fall genügt, um dessen Überfüllen zu vermeiden. Zudem sollen die Druckerzeugnisse an ihren Oberflächen schonend behandelt werden.The invention has for its object to control the speed of a cutting device such that in irregular supply of printed products, the buffer capacity of the stacking magazine is sufficient in any case, to avoid overfilling. In addition, the printed products should be treated gently on their surfaces.
Die erfindungsgemässe Aufgabe wird durch ein Verfahren zur Geschwindigkeitsregelung einer Schneidvorrichtung gelöst, wobei die Druckerzeugnisse jeweils eines zu bildenden Stapels detektiert und auf Basis eines Zeitpunkts der Detektierung eines letzten Druckerzeugnisses des jeweils zu bildenden Stapels eine Ist-Taktzahl des Schneidwerks derart geregelt wird, dass der Stapel dem Schneidwerk innerhalb eines Zeitfensters zugeführt wird.The inventive object is achieved by a method for controlling the speed of a cutting device, wherein the printed products each detected a stack to be formed and based on a time of detection of a last printed product of each stack to be formed an actual cycle number of the cutting unit is controlled such that the stack the cutting unit is fed within a time window.
Vorzugsweise wird der gebildete Stapel auf einem zweiten Förderelement der Zuführvorrichtung zum Schneidwerk transportiert. Dabei wird das Zeitfenster als Differenz zwischen einer längsten zur Verfügung stehenden Zeit und einer kürzesten zur Verfügung stehenden Zeit zum Zuführen des gebildeten Stapels zum zweiten Förderelement berechnet.Preferably, the stack formed is transported on a second conveying element of the feeder to the cutting unit. In this case, the time window is calculated as the difference between a longest available time and a shortest available time for feeding the stack formed to the second conveyor element.
In einem bevorzugten Ausführungsbeispiel wird der gebildete Stapel mit einem Einschieber des zweiten Förderelements zum Schneidwerk transportiert, wobei aus dem berechneten Zeitfenster ein minimaler und ein maximaler Wert für eine Versatzzeit berechnet wird und wobei der Transport des Stapels zum Schneidwerk nach Ablauf der Versatzzeit erfolgt. Dadurch, dass die Ist-Taktzahl des Schneidwerks berechnet und entsprechend eingestellt wird, kann sichergestellt werden, dass eine möglichst kontinuierliche Anpassung des Schneidwerks an die Geschwindigkeit der zugeführten Druckerzeugnisse erfolgt.In a preferred embodiment, the stack formed is transported to the cutting unit with a slide of the second conveyor element, wherein a minimum and a maximum value for an offset time is calculated from the calculated time window and the transport of the stack to the cutting unit takes place after the offset time has elapsed. By calculating the actual number of cycles of the cutting unit and adjusted accordingly, it can be ensured that as continuous as possible adaptation of the cutting unit takes place at the speed of the supplied printed products.
In einem bevorzugten Ausführungsbeispiel wird die Ist-Taktzahl des Schneidwerks aufgrund der Ankunftszeit des letzten Druckerzeugnisses eines zu bildenden Stapels geregelt. Dabei kann die Regelung der Ist-Taktzahl des Schneidwerks durch Verringern oder Erhöhen dieser Ist-Taktzahl gegenüber einer vorherigen Taktzahl erfolgen. Bei stark verspäteter Zufuhr des letzten Druckerzeugnisses eines zu bildenden Stapels wird bevorzugt wenigstens ein Leertakt des Schneidwerks eingefügt und die Ist-Taktzahl des Schneidwerks erhöht.In a preferred embodiment, the actual number of cycles of the cutting mechanism is controlled on the basis of the arrival time of the last printed product of a stack to be formed. In this case, the control of the actual cycle number of the cutting unit can be done by reducing or increasing this actual cycle number compared to a previous cycle number. In case of a very late supply of the last printed product of a stack to be formed, at least one empty cycle of the cutting unit is preferably inserted and the actual cycle number of the cutting unit is increased.
Im bevorzugten Ausführungsbeispiel wird die Geschwindigkeit der Druckerzeugnisse auf dem ersten Förderelement der Zuführvorrichtung abhängig von einer Länge der Druckerzeugnisse und unabhängig von der Ist-Taktzahl des Schneidwerks eingestellt. Dabei können der Schneidvorrichtung Druckerzeugnisse von einer vorgelagerten Verarbeitungsmaschine zugeführt werden, wobei eine nominale Taktzahl des Schneidwerks der Schneidvorrichtung von der Verarbeitungsmaschine vorgegeben wird.In the preferred embodiment, the speed of the printed products on the first conveying element of the feeding device is adjusted depending on a length of the printed products and independent of the actual cycle number of the cutting unit. In this case, the cutting device printed products can be supplied from an upstream processing machine, wherein a nominal number of cycles of the cutting unit of the cutting device is specified by the processing machine.
Die Erfindung wird anschliessend unter Bezugnahme auf die Zeichnung anhand von Ausführungsbeispielen erläutert. In der Zeichnung zeigen:
- Fig. 1
- eine schematische Darstellung einer Schneidvorrichtung für das dreiseitige Beschneiden von Druckerzeugnissen,
- Fig. 2
- ein Diagramm mit den zeitlichen Abläufen bei kontinuierlicher Produktzufuhr,
- Fig. 3
- ein Diagramm mit den zeitlichen Abläufen bei erhöhter Produktzufuhr,
- Fig. 4
- ein Diagramm mit den zeitlichen Abläufen bei reduzierter Produktzufuhr und
- Fig. 5
- ein Diagramm mit den zeitlichen Abläufen bei stark reduzierter Produktzufuhr.
- Fig. 1
- a schematic representation of a cutting device for the three-sided pruning of printed products,
- Fig. 2
- a diagram with the time sequences with continuous product supply,
- Fig. 3
- a diagram with the time courses with increased product supply,
- Fig. 4
- a diagram with the time courses with reduced product supply and
- Fig. 5
- a diagram with the time sequences with greatly reduced product supply.
Die
Die Fördereinrichtung 2 führt die Druckerzeugnisse 3 einzeln nacheinander einer Zuführvorrichtung 4 der Schneidvorrichtung 1 zu, die ein vorliegend als Bandförderer ausgeführtes erstes Förderelement 26 aufweist, das mittels eines regelbaren Motors M1 antreibbar ist. Die Geschwindigkeit der dem ersten Förderelement 26 vorgelagerten Fördereinrichtung 2 wird in Abhängigkeit der Länge der Druckerzeugnisse 3 und der Taktzahl der Verarbeitungsmaschine 33 so gewählt, dass die Zwischenräume zwischen aufeinanderfolgenden Druckerzeugnissen 3 auf der Fördereinrichtung 2 möglichst gering sind. Die Frequenz zugeführter Druckerzeugnisse 3 ist dadurch nach oben begrenzt. Um das Bilden von Zwischenräumen zwischen aufeinanderfolgenden Druckerzeugnissen 3 zur beispielsweise optischen Detektierung sicherzustellen, ist die Geschwindigkeit des ersten Förderelements 26 stets höher als die Geschwindigkeit der Fördereinrichtung 2.The
Mittels des ersten Förderelements 26 werden die Druckerzeugnisse 3 einer Stapelvorrichtung 5 zugeführt, die durch einen senkrechten Stapelschacht 6 mit auf zwei Ebenen angeordneten oberen Stapelschiebern 7 und unteren Stapelschiebern 8 gebildet ist. Die paarweise angeordneten Stapelschieber 7, 8 sind in Richtung eines Doppelpfeils D zwischen einer geschlossenen Stellung, in der die Druckerzeugnisse 3 zurückgehalten werden und einer offenen Stellung, in der die Druckerzeugnisse 3 freigegeben werden, versetzbar. Zur Vermeidung von Schleifspuren am untersten Druckerzeugnis 3 werden die Stapelschieber 7, 8 beim Öffnen zusätzlich vertikal nach unten beschleunigt. Durch die Stapelvorrichtung 5 lassen sich die Druckerzeugnisse 3 während einer gewissen Zeit puffern. Der Stapelschacht 6 wird nach unten durch ein zweites Förderelement 9 in Form eines Einfördertisches begrenzt, auf den durch die Stapelvorrichtung 5 aus einer Anzahl von Druckerzeugnissen 3 gebildete Stapel 10 von oben zugeführt werden.By means of the first conveying
Auf dem zweiten Förderelement 9 werden die Stapel 10 durch einen ebenfalls in Richtung des Doppelpfeils D vor und zurück versetzbaren Einschieber 11 auf einen nicht dargestellten Schneidtisch eines Schneidwerks 12 der Schneidvorrichtung 1 gefördert. Anschliessend wird der Stapel 10 zwischen dem Schneidtisch und einer ebenfalls nicht dargestellten Pressplatte eingespannt. In dieser Position wird der Stapel 10 mittels eines Frontmessers 13 an der Vorderkante und mittels Seitenmessern 14 an den beiden Seitenkanten beschnitten, wobei die Schnittfolge auch umgekehrt erfolgen kann. Nach dem Lösen der Pressplatte wird der fertig beschnittene Stapel 10 mittels eines ersten Förderers 15 und eines nachfolgenden zweiten Förderers 16 in einer Ausförderrichtung A abtransportiert. Dadurch wird der Schneidtisch frei für die Aufnahme des nächsten zu beschneidenden Stapels 10.On the
Vorzugsweise werden der Einschieber 11 durch einen Motor M2, Frontmesser 13 und Seitenmesser 14 gemeinsam durch einen Motor M3, der erste Förderer 15 durch einen Motor M4 und der zweite Förderer 16 durch einen Motor M5 angetrieben. Ein weiterer Motor M6 bildet einen Hauptantrieb der Schneidvorrichtung 1. Der Hauptantrieb treibt alle nicht bereits erwähnten Organe der Schneidvorrichtung 1, wie Ausrichtorgane auf dem Schneidtisch, Überführungsvorrichtungen etc. an und bildet den Masterantrieb für die Motoren M1...5.Preferably, the slide 11 are driven by a motor M 2 ,
Die Motoren M16 sind als drehwinkelgesteuerte Motoren ausgebildet, die mit entsprechenden Antriebsreglern A1...6 verbunden sind. Die Antriebsregler A1...6 sind zum Austausch von Steuersignalen mit einer Steuervorrichtung 17 verbunden. Alternativ können die Antriebsregler A1...6 als ein Teil der Steuervorrichtung 17 ausgebildet sein. Ausgänge der Steuervorrichtung 17 sind mit nicht dargestellten Betätigungsmitteln für die oberen Stapelschieber 7 sowie die unteren Stapelschieber 8 und Eingänge der Steuervorrichtung 17 mit Lichtschranken L1...3 sowie einem Sensor 24 verbunden.The motors M 16 are designed as angle-controlled motors, which are connected to corresponding drive controllers A 1 ... 6 . The drive controllers A 1... 6 are connected to a
Die Lichtschranke L1 ist am Anfang und die Lichtschranke L3 am Ende des ersten Förderelements 26 angeordnet. Die Lichtschranke L2 ist nach der Lichtschranke L1 angeordnet, wobei eine Distanz 30 zwischen diesen beiden Lichtschranken L1, L2 mindestens der Länge eines Druckerzeugnisses 3 in Förderrichtung F entspricht.The light barrier L 1 is located at the beginning and the light barrier L 3 at the end of the first conveying
Das Verfahren wird nachfolgend im Detail, mit Bezug auf die
Der Lichtstrahl, der Lichtschranke L2 wird durch die transportierten Druckerzeugnisse 3 zyklisch unterbrochen. Dadurch ergibt sich ein Signal mit Dunkelphasen 18, wenn der Lichtstrahl unterbrochen ist, und mit Hellphasen 19, wenn sich kein Druckerzeugnis 3 im Bereich des Lichtstrahls befindet. Ein zugehöriges Zeitdiagramm ist in
Unter Einbeziehung der Anzahl von Druckerzeugnissen 3 pro Stapel 10 und der Zeit zwischen aufeinanderfolgenden Impulsen 20 berechnet die Steuervorrichtung 17 eine zugehörige Ist-Taktzahl TE bzw. einen Maschinenzyklus Zn der Schneidvorrichtung 1 und treibt den Motor M6 mittels des Antriebsreglers A6 mit der entsprechenden Drehzahl an. Dadurch resultiert bei kontinuierlich erzeugten Impulsen 20 durch die Lichtschranke L2 ein ebenfalls kontinuierlicher Lauf der Schneidvorrichtung 1 mit der Ist-Taktzahl TE, die der nominalen Taktzahl TN entspricht. Die Ist-Taktzahl TE wird nach oben durch eine maximale Taktzahl TMAX und nach unten durch eine minimale Taktzahl TMIN begrenzt.Taking into account the number of printed
Die Geschwindigkeit des ersten Förderelements 26 der Zuführvorrichtung 4 wird durch die Steuervorrichtung 17 auf der Basis der der Steuervorrichtung 17 bekannten Länge der Druckerzeugnisse 3 in Förderrichtung F berechnet und der Motor M1 durch den Antriebsregler A1 mit der erforderlichen Drehzahl angetrieben, wobei die Geschwindigkeit des ersten Förderelements 26 nach unten begrenzt ist. Dadurch wird einerseits erreicht, wischen den Druckerzeugnissen 3 in der Zuführvorrichtung 4 genügend grosse Lücken gebildet werden und andererseits eine Mindestgeschwindigkeit bei der (wurfartigen) Zuführung der Druckerzeugnisse 3 in die Stapelvorrichtung 5 nicht unterschritten wird. Für die Produktverfolgung der Druckerzeugnisse 3 innerhalb der Zuführvorrichtung 4 ist an einem Antriebsrad 21 des ersten Förderelements 26, wie in
Durch die Detektierung der Druckerzeugnisse 3 mit der Lichtschranke L2 und einer Produktverfolgung ist die Steuervorrichtung 17 jederzeit in der Lage die Position eines Druckerzeugnisses 3 auf dem ersten Förderelement 26 relativ zur Lichtschranke L2 und eine Zeit tB zu berechnen, die ein Druckerzeugnis 3 benötigt, um eine Distanz 31 zwischen der Lichtschranke L2 und der Lichtschranke L3 zurückzulegen, bzw. die Zeit bis das Druckerzeugnis 3 am Stapelschacht 6 ankommen sollte. Ausserdem kann die Steuervorrichtung 17 eine mindestens benötigte Zeit tk berechnen, die nach der Detektierung eines letzten Druckerzeugnisses 3 des zu bildenden Stapels durch die Lichtschranke L3 erforderlich ist, bis sich auf den unteren Stapelschiebern 8 ein fertiger Stapel 10 gebildet hat und eine Zeit tl, die höchstens zur Verfügung steht, bis die unteren Stapelschieber 8 geöffnet werden müssen, damit sie rechtzeitig wieder für die Bildung eines nächsten Stapels 10 bereit sind. Innerhalb eines durch die Zeit tl und Zeit tk gebildeten Zeitfensters 25 müssen die unteren Stapelschieber 8 geöffnet und damit der Stapel 10 dem zweiten Förderelement 9 von oben zugeführt werden.By detecting the printed
Andererseits muss sich der Einschieber 11 in einer hinteren Endlage 27 befinden, wenn die unteren Stapelschieber 8 geöffnet werden und darf mit seiner Vorwärtsbewegung erst beginnen, wenn sich der Stapel 10 auf dem zweiten Förderelement 9 befindet. Der Bewegungsablauf 29 des Einschiebers 11 ist in den
Der früheste mögliche Zeitpunkt tf, zu dem der Einschieber 11 mit dem Einschieben beginnen kann ergibt sich dann, wenn der Stapel 10 zur Zeit tk von oben zugeführt wird und nach einer Fallzeit to, unmittelbar das zweite Förderelement 9 erreicht hat. Der späteste mögliche Zeitpunkt ts, zu dem der Einschieber 11 mit dem Einschieben beginnen kann ergibt sich dann, wenn der Stapel 10 zu der Zeit tl von oben zugeführt wird, gleichzeitig der Einschieber 11 seine hintere Endlage 27 erreicht hat und nach Ablauf der Rastzeit tr, während der der Einschieber 11 in der hinteren Endlage 27 verbleibt.The earliest possible time t f , at which the inserter 11 can begin insertion, is obtained when the
Ein Bereich B, innerhalb dem der Einschieber 11 mit dem Einschieben eines Stapels 10 beginnen kann berechnet sich somit nach der Formel B= tl-tk+tr-to. Die Steuervorrichtung17 berechnet bei jedem Durchgang des letzten Druckerzeugnisses 3 eines jeweils zu bildenden Stapels 10 bei der Lichtschranke L2 eine Versatzzeit tOffset = tB+tk+to+tv bis zum Beginn der Einschiebebewegung des Einschiebers 11 (tv eine zu wählende vorteilhafte Zeit, s. u.) und korrigiert die Ist-Taktzahl TE bzw. den Maschinenzyklus Zn des Schneidwerks 12 in dem Sinne, dass der Beginn der Einschiebebewegung exakt nach der Versatzzeit tOffset erfolgen kann. Es ist vorteilhaft, wenn die Zeit tv in etwa gleich B/2 gewählt wird, um sowohl auf kurzfristig erhöhte oder auch verminderte Zuführgeschwindigkeiten von Druckerzeugnissen 3 reagieren zu können.An area B within which the inserter 11 may begin with the insertion of a
Bei jedem Durchgang des letzten Druckerzeugnisses 3 eines zu bildenden Stapels 10 bei der Lichtschranke L3 vergleicht die Steuervorrichtung 17 die berechnete Zeit tB, mit einer gemessenen und korrigiert im Falle einer Abweichung die Ist-Taktzahl TE des Schneidwerks 12 in dem Sinne, dass der Beginn der Einschiebebewegung an der beabsichtigten Stelle innerhalb des Bereichs B erfolgen kann. Mittels Messung des Ankunftszeitpunkts der Druckerzeugnisse 3 beim Stapelschacht 6 lassen sich zudem die Stapeischieber 7, 8 zeitlich genauer steuern.On each passage of the last printed
Der Ablauf wird anhand Stapels 10, bestehend aus den drei Druckerzeugnissen 3 mit den Nummern n1, n2, n3 beschrieben. Druckerzeugnisse 3 mit den Nummern n1 und n2, werden durch die Lichtschranke L2 detektiert und generieren die Impulse 20 (n1) und 20 (n2). Erreicht die vordere Kante des Druckerzeugnisses 3 mit der Nummer n3 die Lichtschranke L2 werden die Zeiten tl, tk, to, tv tr und tB ermittelt. Daraus berechnet die Steuervorrichtung 17 anschliessend die Versatzzeit tOffset. Einige der Werte für die Zeiten tl, tk, to, tv, tr und tB können alternativ als Konstante in einem Speicher der Steuervorrichtung 17 abgelegt und von hier ausgelesen werden. Der Wert für to kann beispielsweise dann als konstant eingestuft werden, wenn die Fallzeit to eines Stapels 10 in ein und derselben Stapelvorrichtung 5 konstruktiv bedingt immer denselben Wert hat.The process is described with reference to stack 10, consisting of the three printed
Ergibt die Berechnung, dass wenn das Schneidwerk 12 der Schneidvorrichtung 1 mit der momentanen Ist-Taktzahl TE weiter läuft, nach Ablauf der Zeit tOffset der Einschieber 11 mit dem Einschieben beginnen wird, so bleibt die Ist-Taktzahl TE konstant. Andernfalls wird die Ist-Taktzahl TE angepasst, wie dies in der weiteren Beschreibung näher ausgeführt wird.If the calculation shows that when the cutting
In der
Das Verfahren kann vereinfacht umschrieben werden als Synchronisationsverfahren des Schneidwerks 12 einer Schneidvorrichtung 1 durch vorheriges Detektieren der Druckerzeugnisse 3 und Regeln der Ist-Taktzahl des Schneidwerks 12 nach den zugeführten Druckerzeugnissen 3, wobei im Falle, dass der zu schneidende Stapel 10 zu spät gebildet wird, die Ist-Taktzahl TE des Schneidwerks 12 erhöht wird und wenigstens ein Leertakt erzeugt wird. Mittels der Lichtschranke L1 und der Lichtschranke L2 zusammen mit dem Taktgeber 22 ist die Steuervorrichtung 17 in der Lage, festzustellen ob und wo sich ein Druckerzeugnis 3 auf dem ersten Förderelement 26 befindet. Dies erlaubt es, im Falle eines Stopps der Schneidvorrichtung 1 und/oder der Fördereinrichtung 2, das erste Förderelement 26 mit der ursprünglichen Geschwindigkeit leer zu fahren oder so schnell anzuhalten, dass der Stapelvorrichtung 5 kein Druckerzeugnis 3 mit zu kleiner Geschwindigkeit zugeführt wird. Befindet sich nach dem Anhalten des ersten Förderelements 26 noch ein Druckerzeugnis 3 auf dem ersten Förderelement 26, kann das erste Förderelement 26 rückwärts angetrieben werden, bis Druckerzeugnis 3 durch die Lichtschranke L1 detektiert wird.The method can be simplified as a synchronization method of the cutting
Nach dem Wiederanlauf des ersten Förderelements 26 in Förderrichtung F steht dem sich darauf befindenden Druckerzeugnis 3 anschliessend eine grosse Beschleunigungsstrecke zur Verfügung, sodass die (wurfartige) Zuführung in die Stapelvorrichtung 5 mit voller Geschwindigkeit erfolgen kann.After restarting the first conveying
Claims (8)
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CN103760822A (en) * | 2013-12-30 | 2014-04-30 | 成都乐创自动化技术股份有限公司 | Cutting method and device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3361890B1 (en) * | 2015-10-16 | 2020-03-04 | O&M Halyard International Unlimited Company | Method and system for automated stacking and loading of wrapped facemasks into a carton in a manufacturing line |
CN109366707B (en) * | 2018-12-12 | 2021-05-25 | 醴陵华鑫电瓷科技股份有限公司 | Automatic cutting device is used in electroceramics processing |
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DE3302946C2 (en) | 1982-02-05 | 1986-12-04 | H. Wohlenberg KG GmbH & Co, 3000 Hannover | Three-knife cutting machine |
DE3840053A1 (en) * | 1987-12-21 | 1989-06-29 | Polygraph Leipzig | Apparatus for feeding books or brochures in stack form in processing machines |
DE3920557C2 (en) | 1989-06-23 | 1995-02-16 | Wohlenberg Kg H | Process for dynamic performance adjustment of a cutting machine and cutting machine itself |
EP0887157A2 (en) | 1997-06-25 | 1998-12-30 | Wohlenberg Schneidesysteme GmbH | Device and method for feeding book blocks to a three side cutter |
US6106219A (en) * | 1999-01-20 | 2000-08-22 | John Robert Newsome | Stack forming and conveying apparatus |
DE10321370A1 (en) | 2003-05-13 | 2004-12-02 | Kolbus Gmbh & Co. Kg | Device for loading a three-knife cutting machine |
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US3207017A (en) * | 1964-02-28 | 1965-09-21 | Chicago Machinery Lab Inc | Method and apparatus for trimming and splitting double books into separate books |
US3693486A (en) * | 1971-03-03 | 1972-09-26 | Arcata Graphics | Conveyor system |
US3841182A (en) * | 1973-07-30 | 1974-10-15 | Mccain Mfg Co | Book trimming machine |
US4545447A (en) * | 1977-11-07 | 1985-10-08 | Cashin Systems Corp. | Apparatus for stacking and weighing sliced food products |
GB8729442D0 (en) * | 1987-12-17 | 1988-02-03 | Chambon Ltd | Carton blank die-cutting machine assembly |
IT1304036B1 (en) * | 1998-07-15 | 2001-03-02 | Gd Spa | METHOD AND DEVICE FOR THE FEEDING OF WRAPS OF WRAPPING MATERIAL IN A PACKAGING MACHINE. |
GB0027213D0 (en) * | 2000-11-07 | 2000-12-27 | Denny Bros Printing | Booklet |
US7137625B2 (en) * | 2002-02-12 | 2006-11-21 | Ricoh Company, Ltd. | Sheet finisher including means for setting cutting position image forming system including the sheet finisher |
JP4160821B2 (en) * | 2002-02-12 | 2008-10-08 | 株式会社リコー | Paper processing apparatus and image forming system |
EP1647373B1 (en) * | 2004-10-18 | 2011-06-22 | Müller Martini Holding AG | Method for cutting more sides of a printed product |
US8919758B2 (en) * | 2011-04-07 | 2014-12-30 | Mueller Martini Holding Ag | Method and device for removing at least one book block from and/or supplying at least one book block to a conveying section of a book production line |
CH705026A2 (en) * | 2011-05-16 | 2012-11-30 | Ferag Ag | Apparatus and method for generating an uninterrupted imbricated stream of flat product units, in particular printed products. |
-
2012
- 2012-08-03 JP JP2012172614A patent/JP5954821B2/en not_active Expired - Fee Related
- 2012-08-08 BR BRBR102012019912-2A patent/BR102012019912A2/en active Search and Examination
- 2012-08-08 EP EP20120179689 patent/EP2559529B1/en not_active Not-in-force
- 2012-08-14 US US13/584,851 patent/US9126348B2/en not_active Expired - Fee Related
- 2012-08-15 CN CN201210289865.5A patent/CN102950618B/en not_active Expired - Fee Related
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DE3302946C2 (en) | 1982-02-05 | 1986-12-04 | H. Wohlenberg KG GmbH & Co, 3000 Hannover | Three-knife cutting machine |
DE3840053A1 (en) * | 1987-12-21 | 1989-06-29 | Polygraph Leipzig | Apparatus for feeding books or brochures in stack form in processing machines |
DE3920557C2 (en) | 1989-06-23 | 1995-02-16 | Wohlenberg Kg H | Process for dynamic performance adjustment of a cutting machine and cutting machine itself |
EP0887157A2 (en) | 1997-06-25 | 1998-12-30 | Wohlenberg Schneidesysteme GmbH | Device and method for feeding book blocks to a three side cutter |
US6106219A (en) * | 1999-01-20 | 2000-08-22 | John Robert Newsome | Stack forming and conveying apparatus |
DE10321370A1 (en) | 2003-05-13 | 2004-12-02 | Kolbus Gmbh & Co. Kg | Device for loading a three-knife cutting machine |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103760822A (en) * | 2013-12-30 | 2014-04-30 | 成都乐创自动化技术股份有限公司 | Cutting method and device |
CN103760822B (en) * | 2013-12-30 | 2016-06-22 | 成都乐创自动化技术股份有限公司 | A kind of cutting method and equipment |
Also Published As
Publication number | Publication date |
---|---|
US20130042734A1 (en) | 2013-02-21 |
JP2013040046A (en) | 2013-02-28 |
CN102950618B (en) | 2016-03-30 |
EP2559529B1 (en) | 2013-10-16 |
JP5954821B2 (en) | 2016-07-20 |
CN102950618A (en) | 2013-03-06 |
BR102012019912A2 (en) | 2013-10-29 |
US9126348B2 (en) | 2015-09-08 |
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